Device and method for assembling armatures



Qct. 13, G. H. LELAND ET AL DEVICE AND METHOD FOR ASSEMBLING ARMATURESFiled May 17, 192 5 Sheets-Sheet 1 Mfisses [2702 722775 hula wadflfizfzgg Z MMJMJ/ma' Oct. 13,1925.

. G. H. LELAND ET AL.

DEVICE AND METHOD FOR ASSEMBLING ARMATURES Filed May 17, 1920 5Sheets-Sheet 5 w 4 M 1 ifffi,

G. H. LELAND ET AL DEVICE AND METHOD FOR ASSEMBLING ARMATURES Oct. 13,1925 Filed May 17, 1920 5 Sheets-Sheet 4 L A D N A L E L H G 5 2 9 1 3..1 M

DEVICE AND METHOD FOR ASSEMBLING ARMATURES Filed May 17, 1920 5Sheets-Sheet 5 Patented Oct. l3, 1925.

UNITED STATES PATENT OFFICE.

GEORGE E. LELAND AND ROBERT H. AHLERS, OF DAYTON, OHIO, ASSIGNORS TO THEDAYTON ENGINEERING LABORATORIES COMPANY, OF DAYTON, OHIO, A. CORPORA-T1011 01' OHIO.

DEVICE IETHOID FOB A$SEMBLING ABMATUBIB.

Application flle'd Kay 17, 1920. Serial No. 882,080.

To all whom it may concern:

Be it known that we, GEORGE H. IJELAND and ROBERT H. AHLERS, citizens ofthe United States of America, residing at Dayton, county of Montgomery"and State of Ohio, have invented certain new and useful Improvements inDevices and Methods for Assembling Armatures, of which the following isa full, clear, and exact description.

This invention relates to the manufacture of armatures and moreparticularly to the art of securing a plurality of wires in the openslot of an armature core.

The principal objects of the present invention are to provide a methodand apparatus for insertingmicarta, paper, or other strips in theopeningin an armature slot to hold a plurality of wires in the latter wherebthe cost of manufacturingthe cores is re need and greater uniformity inthe product is secured.

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had to the accompanyingdrawing,-wherein a preferred embodiment of the present invention isclearly shown. 7

Referring to the drawings:

Fig. 1 is a perspective view of the device used in assembling armatures;

Fig. 2 is a perspective view of a retainer strip to be inserted in thearmature slots by the device shown in Fig. 1;

Fig. 3 is a perspective View of a removable magazine'container forming apart of the device;

Fig. 4 is a plan view of the device shown in Fig. 1;

Fig. dis a side elevation of the device shown in Fig. '1;

Fig. 6 is a sectional view taken along the line 6-6 of Fig. 4;

Fig. 7 is a view similar to Fig. 5, the parts being shown in theirrespective positions immediately after the operation of inserting theretainer strip in the armature slot has been completed;

Fig. .8 is an enlarged front view of the device; I

Fi 9 is'a view showing the device entering t e armature slot, a portionof the device being shown in elevation while a portion of the armaturecore includin one slot is shown.in section.. '1 'his viewlustrates thedevice forcing the armature windings down into the core and having itsknife inserted between the periphery ofthe core and the surroundinginsulating lining material;

Fig. 10 is a view similar to Fig. 9, the device, however, being shown inpart section taken along the line 1010 in Fig. 7 and illustrates thestep of folding the cut edges of the insulating lining material againstthe windings in the slot;

Fig. 11 is a fragmentary sectional view of a portion of the armaturecore showing the retainer strip inserted in the armature slot betweenthe turned down edges of the insu-c lating material and the restrictededges of said slot;

Fig. 12 is a side elevation view showing the device being forced intothe armature slot by means of a power controlled hook, a part of thearmature being broken away. The device is shown in a position where theforcing down operation, cutting operation and folding operation havebeen in progress and the strip inserting operation about to start;

Fig. 13 is a view similar to Fig. 12 and shows the position of thedifferent elements at the completion of the operations;

Fig. 14 is a sectional view taken on the line,14-14= of Fig. 12;

Fig. 15 is a side view of a modified form of the device; and

Fig. 16 is a side elevational view partly in section of the device shownin Fig. 15, the

device bein in extended position in Fig. 16.

In assem ling armatures, it has been the practice, after the laminationsof the core have been secured to the armature shaft, to face the coreteeth and to line the core slots with a continuous strip of insulatingmaterial which covers the interior surfaces of the slots and theperiphery of' the core. Thenthe windings are inserted in theirrespective slots. The operator then forces the turned down against thewindings in the slots. The next operation completes the assembling ofthe armature by inserting a retainer strip, which in: the form shownconsists of stiff insulating material, in the slots on top of the turneddown ed es of the lining material, for preventing tie windings fl ingout, due to centrifugal force when t e armature is in operation.

From the aforegoing description it can be clearly seen that this methodis slow, necessitates a series of 0 erations requiring a separate toolfor eacii operation, and that between the operations of driving thewindings together and inserting the retaining strip the windings loosenand increase the difliculty of inserting the strip.

Referring more particularly to the Figs. 1, 4, 5, 6 and 7, the device isshown comprising a relatively movable portion whichv may be termed thepilot member and a relatively stationary portion which may be.

termed the housing member.

If order to simplify the description and thus permit a clearerunderstanding of the construction of the device, the pilot member willfirst be fully described.-

The pilot member is designated by the numeral 20 and comprises a guideportion 21, provided with web and flange portions, 22 and 23respectively. At the forward extremity, the guide, web and flangeportions 21, 22 and 23, are rounded off in order to facilitate theirintroduction into the slots of the armature as will be fully explainedhereinafter. As is shown in Figs. 8 and 9, the under surface of flangeportion 23 is concaved for purposes to be set forth.

In the web portion 22, and adjacent to the forward extremity thereof,there is rovided a transverse slot 24 (see Fig. 6) a apted to receive aknife 25. This knife-25 has two angularly arranged cutting surfaces26,'the apex of the angle between these two cutting surfaces beingadapted to abut against the forward end wall of the slot 24. The bodyportion of the knife 25 is rounded off as at 27 in order to permit theknife to be swung into position in the slot. A vertical set screw 28, isadapted to be screwed into the guide portion 21, of the pilot member 20,the screw being of such length as to ermit its lower end to enga withthe kni e 25 in the slot 24, to secure y hold said knife in. the esiredposition; A in 29 passing transversely through the guide portion 21, andhaving portions thereof projecting on each side of said guide portion isalso held -in position by the screw 28 passing therethrough.

Another pin 30, is provided in the top of said guide portion 21 and isso located as to act as a stop for certain movable parts explainedhereinafter.

Adjacent to the slot 24, a notch 31.is provided which spaces the web 22and the flange 23 froma web 22" and a flange 23, aligned respectivelywith web 22 and flange 23. This notch 31 is so formed as to have a face32 substantially perpendicular to flange 23 at its forward side whilethe opposite face is inclined as at 33 to gather or fold the edges of aninsulating paper over the windings. The web portion 22 between the notch31 and theforward extremity of the guide 21 is of smaller transversedimensions than the web portion 22" on the opposite side of said notch.This web portion 22 is provided with flange portion 23 for only a partof its length, some of the flange portion being cut away to provide areceptacle for the retainer strip as will be explained later and topermit the withdrawal of the pilot or guide bar radially from the slot.

By referring particularly to Fig. 6, the pilot member 20 is shown havingan enlarged body portion 34. Adjacent to the pilot member and in saidbody portion there is provided a chamber 35, adapted to receive theretainer strip magazine 36.

A recess 37 is formed in the body portion 34, at each endof the chamber35. Each of these recesses contains a latch member 38 fulcrumed on thepin 39 and held in normal or looking position by the coil spring 40.These latch members 38 are adapted to hold the retainer strip magazine36 in position within the chamber 35.

Adjacent to the lower forward end of the chamber 35 and adjacent theinner end of the web portion 22, there is tovided a detent 42, slidablarrange n a recess 41 formed in the dy 34. This detent has a cylindricalupper guide portion 43, see Fig. 5, and a rectangular lower portion 44.The bottom of this rectangular lower portion 44 is slightly inclined asat 45 for purposes hereinafter described. \Vhere the cylindrical andrectangular tions of the detent 42 'conjoin a shou der is formed whichengages with astop 46 secured to the web portion 22 in any suitablemanner to retain the detent in the recess 41. A- coil spring 41' tendsto normally hold the detent in a depressed position to engage aretaining strip carried by the housing member.

The body portion 34 is provided with a slot 47, and a in 48 extendsacross slot 47 and is attached to one end of a spring 49 (Fig. 6).

Holes. 50, are provided to reduce the weight of the body 34. I

Body 34' hasa reduced shank portion 51 on which is mounted handle 52secured thereto by means of the screw 53.

Referring to Figs. 3 and 6, the retainer strip magazine 36 comprises areceptacle 53 which is adapted to holda plurality of I insulatingmaterial. A cover plate is secured to the cover plate of the magazine36,

is adapted to engage, to hold the plate 57 in a position near the saidcover plate to facilitate the loading of said magazine with retainerstrips. A pair of oppositely disposed sprin blades 60 tend to force theplate 57 an consequently the stack of retainer strips downwardly in themagazine as shown in Fi s. 3 and 6.

In Fig. 6, t e guide portion 21 of the pilot 20 may be made up of twoseparate pieces 21 and 21, held to ther by means of a series of screws21". e main object of this method of construction is to eliminate thenecessity of discarding the entire piece if for any reason the guidemember 21 or its associated parts are damaged during the use of thedevice. 7 Due to abnormal strains these parts may be damaged and if so,the construction illustrated in Fig. 6 will permit replacing theportion21 thus making the entire device again usable.

The stationary element. associated with the heretofore describedelements will not be described.

By referring to the Figs. 1, 4, 5, 6, 7

\ and 8, the numeral 75 designates the relativel stationary element. ofthe device, whic will be termed the housing. This housing consists oftwo side walls 76 and 77, and upper and lower plates 78 and 79respectively. The plate 78, securing the two side Walls together attheir upper edges, is cut away to permit the removal of the retainerstrip magazine 36 without disassembling any portion of the device. Theplate 78 engages with the upper surface of the body portion 34 thusforming a bearing for this body portion. A channel 78 is formed intheunder surface of plate 78 in order to provide a clearance over thecover plate of the magazine 36 when the device is in operation.

In order to provide an upper bearing at the forward extremity of theside walls 76 and 77, a plate 82 is provided, said plate being securedto the edges of both or formed integral with one and secured to theother upper edge .of either of the said side walls 76 and 77. This plate82 is channelled as at 83 to fit the contour of the guide. portion 21,ofthe pilot'20. l

I As has been mentioned heretofore, ,the' housing 5 is providedwitha'bottom or lower late 79 secured to the lower edges of the si ewalls 76 and 77, said lower plate being of such length, that its forwardedge 80 comes into close proximity to the inclined side of therectangular portion 44 of detent 42, when the movable element of thedevice is shifted to the extreme right hand portion relative to thehousing as is shown in Fig. 7. A longitudinal channel 81 is formed inthe inner surface of the plate 79 and extends from the forward edge ofsaid plate 79 rearwardly to a line 81 where the channel is narrowed andthence 'rearwardly to a line 81 which is slightly beyond the point wherethe detent 42 is located relative to the housing 75 when the differentparts of the device are in the posinel beingsubstantially equal to thethichness of a retainer strip 54. From line 81 to line 81*, the channel81 is less' in width than retainer strip 54, but greater in width thandetent- 42 (Fig. 14) to permit the detent to drop into the channel at apoint in back of the retainer strip.

By forming the channel 81 wider than the web 23, a relatively wideretainer strip may be employed which may be wedged tightly into thearmature slot in the space provided by the progressive wedging of thewindings away from the under cutshoulders at the neck of the slot.

Both side walls 76 and 77 are provided with ears 82 oppositely disposed.These ears are so positioned that a screw 83 passing through both, isadapted to pass through the slot 47 also. This screw is held in positionin the ears by means of a nut 84, said screw acting as anchorage for oneend of the spring 49, the other end of which is anchored to a pin 48.carried by the body 34.

Having described the construction of the device and its component parts,the mode of operation of the same will now be set forth. I The retainerstrip magazine 36 is first filled, after removing same fro-m the chamber35 in body portion 34. The magazine can be removed by depressing thelatch members 38. As the springs 60 normally tend to push the plate 57out of the receptacle 53, the said platemay be drawn into the saidreceptacle by means of the rod 55 to provide space for the stack ofretainer strips to be inserted. In order to facilitate this-loading orinserting of the retainer strip pack, a

55 will be held .in this loading position, thereby preventing thesprings 60 from forc- ;ing the stack of retainer strips out cf thereceptacle 53 during the loading operation. After loading, the; magazine36 is placed within the, chamber 35 in which position the latches 38will firmly hold it. Then the catch 59 is withdrawn from engagement withthe slot 58, permitting the springs 60 to push the plate 57 against thestack of retainer strips and the lower strip against the inner surfaceof the lower plate 7 9 of housing 75.

An armature core non-conducting wrapping 94 which usually covers itsperiphery and lines the armature slots. l/Vindings 95 are located in theslots in any suitable manner.

The operator now inserts'the nose of the pilot 20 in one of thearn'iature slots, so that the flange portion 23 thereof'enters the wireretaining portion 91 of the slot and the web portion 22 enters therestricted neck portion 92 see Fig. 9. Longitudinal pressure is nowexerted by the operator, on the handle 52, causing the pilot 20 tofurther enter the slot, thereby forcing the knife element 25 carried bysaid pilot, within the space between the lining material 94 and theperiphery of the core.

Further movement of the pilot in the slot will now cause the an ularcutting surfaces 26 of the knife 25 to force the lining materialinwardly toward their respective sides of the web portion 22, cuttingsaid lining material at the peripheral edges of the restricted neck 92of the slot and progressively compacting the winding throughout thelength of the slot to provide a space for the leading end of theretainer strip. Thepres sure. of the web of the pilot against the paperholds-the latter stationary during the cutting operation. This web alsoacts as a guide for the cutting and wedging' tools. As shown in Fig. 9,the transverse thickness of the web portion 22 is of such a dimension asto permit it to pass readily between the layers of lining material atthe sides of said neck 92. The web portion 22 at the inclined surface33, is thicker transversely than the web portion 22 conjoining theerpendicular surface 32, so that when sai inclined surface 33 is movedinwardly into the slot, it will engage with the sheared off edges of thelining material in the neck 92, turning them down in such a manner thatthe following flange 23 will fold said edges down against the windingsin the slot as is clearly shown in Fig. 10. By referring also toFig'."12, the positions of the various elements of the device relativeto the armature,

at this stage of the assembly operation, are

shown. The lower edge 80 of the housing 75 engages the side wall of thearmature to,

cause a relative movement between the housing and the member 21 and feeda retaining 1 strip into the space provided by the wedging member.

As the pilot 20 is moved still further into the armature slot, theflange 23 will form a pathway between the lining material and 90 isprovided with a the restricted neck portion 92 of said slot, into whichthe retainer strip 54 will be inserted. This strip 54 is held in thisposition by having its forward end, which, as can be seen in Flg. 2 ispointed, fit in a corres ondingly shaped cut awa portion in the ange 23,while its rear en is engaged by the detent 42 and by the edge of channel81 at line 81. The manner in which this retainer strip 54 is held inposition relative to the web portion 22", substantially causes it toform a continuance of the flange portion 23, thereby tending to causesaid strip to follow the flange portion 23 into the space in thearmature slot above the cut edge portions of the lining 94 as shown inFig. 11.

In order that this device may be used for completing the assembly of aseries of armature slots without the necessity of manually loading orplacing a retainer strip in position preliminary to each operation,there is provided a magazine 36, which as has been set forth in some ofthe preceding paragraphs, is adapted to carry a supply of retainerstrips for a series of operations.- It has also been mentioned and isclearly shown in Fig. 6 that the bottom strip in the stack included in.the magazine rests upon the inner surface of the lower plate 79 of thehousing 75 due to the pressure of the springs 60 on the plate 57 restingon the top of the stack of retainer strips.

Now in order to replace the retainerstrip 54, held in position in thereceptacle in pilot 20, with a strip from the magazine after the firstone has been inserted in the armature slot, the housing 75 is providedwith an edge or surface 80, which, as is shown in Figs. 12 and 13 isadapted to engage with the edge of the core of the armature therebycausin relative movement between the pilot an body portion 20, and thehousing portion 75 of the device. This relative movement between theseelements will cause the lowest retainer strip in the pack included inthe magazine to slide along the lower plate 79 until the limit of travelis reached as shown in Figs. 7 and 13, when said lowest retainer stripwill be forced down into the channel 81 formed in the forward portion oflower plate 79.

When the position of the assembling device relative to the armature isas shown in Fig. 13, the operation of forcing down the windings into thecore, of cutting and foldin the core lining, and of insertin theretainer strip will have been complete Now if the tool be moved u wardlyin the direction 'of arrow 120 in ig. 13, the retainer strip will remainin the armature core. The

edge 80 being free of the armature core, the spring 49 Wlll be releasedfrom distended position and will cause the parts of the assembling toolto return to normal position, shown in Figs. 1, 4, 5 and 6. This returnber 21 nan-2,2

of these elements to normal position will cause a reverse relativemovement betweensaid elements from that described thereby causing thedetent 42 to ride or slide over the upper surface of the strip 54 in thechannel 81. Due to the fact that one end of said strip 54 abuts againstthe edge 81" of the channel 81, said strip 54 cannot move backwardly outof the channel 81, but the detent 42 may slide over strip 54- sincedetent 42 is provided with an inclined face 45 on its rearward sidewhich causes detent 42 to be forced up into'the recess 41 against thepressure f spring 41".

From the aforegoing description it can be seen that each cycle ofoperations will tend tojinsert a retainer stri into the armature slot,while at the same time another retainer strip will be automaticallyremoved from the stack in the magazine and placed in posltion to beinserted in the next adjacent armature slot during the following cycleof operation.

As has been described, the operation of the device is brought about bythe operator exerting longitudinal pressure on the handle 52. However,in the Figs. 12 and 13 there is shown mechanical means for transmittingpower to cause the pilot 20 to enter and pass through the armature slot.This mechanical means includes cylinder 100, utilizing any suitablemeans of power to actuate a piston (not shown) which is connected with arod 101. This rod is provided at its outer end with a fulcrum pin 102 towhich is anchored a'hook element 103 adapted to engage the pin 29secured to the pilot member 20. A spring 104 carried by the rod 101 isadapted to hold the hook element 103 in engagement with the pin 29. Anysuitable control may be utilized to direct pressure on the piston (notshown) in cylinder, whereby the rod 101 may be moved backwardly andforwardly to. eifect'the operation of the assembling device. Obviouslythe hinged hook 103 may be swung away from the pin 29 to release thetool.

The armature may be rigidly held in posi' tion by means of any suitabledevice correctly located relative to the power cylinder.

In the modified form shown in Figs. 15 and 16, the stationary membercorresponding to member 75 of the first form is provided with a hollowhandle 130 into which slides a hollow extension 131 of the member 21corresponding to member 21 of the first form. Spring 85* is attached bypin 83 to handle 130 and by pin 48 to mem- For convenience inmanufacture the part 135 carrying members 38, 39 and 40 is notconstructed integrally with member 21 but is formed as a separate partand secured to member 21 by screws 136.

The compacting of the windings in the slots is effected more uniformlyand in a formed in a small fraction of the time required heretofore infact it has been found that when a strip is in operative position on thetool the wedging, cutting and strip plac ing operations may be performedon the smaller armatures such as are employed in gas engine starting andlighting systems in less than a second.

\Vhile the forms of mechanisms herein shown and described constitutepreferred forms of embodiments of the invention, it is to be understoodthat other forms might be adopted, all coming within the scope of theclaims which follow.

\Vhat we claim is:

1. The method of inserting a retaining strip in each of a series oflongitudinal slots in an armature core, which includes rotating the coreto bring a slot to a predetermined position; moving a wire compactingtool longitudinally through a slot in said position to compress wires inthe slot, removing the tool from the opposite end of the slot; andplacing a retaining strip in each of the slots while the wires are incompact relation.

2. The method of inserting a retaining strip in each of a series oflongitudinal slots in an armature core, which includes intermittentlyrotating the core to bring the slots successively to a predeterminedposition; insorting a wedging tool at one end of a slot in saidposition; moving the tool through the slot by power operatedmeansoperating from the. opposite end of the slot; and feeding aretaining strip intothe recess progressively with the movement of thewedging tool therein.

3. The method of completing an armature having an open slotted core,which includes lining the slots with insulating material, in applyingwindings, and compacting said windings in the slots concomitantly withthe cutting off of the insulating material lining the slots.

4. The method of completing an armature having an open slotted core,which comprises lining the slots with insulating material, in applyingwindings, and compacting said windings in the slots concomitantly withthe inserting of a retainer strip between the windings and the edges ofthe slots.

5. The method of completing an armature having an open slotted core,which comprises lining the slots with insulating material,

applyin windings, and shearing the lining materia? adjacent the openingsin the slots,

concomitantly with the turning down of said :heared edges against thewindings in said ots.

6. The method of completing an armature having an open slotted corewhich includes lining the slots with insulating material, applyingwindings, and shearin the lining material adjacent the edges of t eslots, concomitantly with the inserting of a retainer strip in saidslots between the windings and the ed es of the slots.

7. T e method of completing an armature having an open slotted corewhich includes lining the slots with insulating material, applyingwindings, and forcing said windin 5 together in the slots concomitantlywith t e shearing of the lining material at the edges of the slots,while at the same time turning said sheared edges down against thewindings in the slots.

8. The method of completing'an armature having an open slotted corewhich includes lining the slots with insulating material, applyingwindings, and forcing said windings together in the slots concomitantlywith the shearing of the lining material at the edges of the slots,while at the same time inserting retainer stri s into the slots betweenthe windings an the edges of the slots.

- 9. The method of completing an armature having an open slotted corewhich includes lining the slots with insulating material, ap plyingwindings, while concomitantly compacting'said windings in the slots,shearing the lining material at the edges of the slots,

turning said sheared edges of the lining material down against thewindings and inserting a retainer strip into the slots between thewindings, and the edges of said slots.

10. The method of completing an armature having an open slotted corewhich includes lining the slots wit-h insulating material, applyingwindings while concomitantly shearing the lining material at the edgesof the slots, and turning said sheared edges of the lining material downagainst the windings, and inserting a retainer strip into the slotsbetween the windings and the edges of said slots.

11. The method f completing an armature having an open slotted corewhich includeslining the slots with insulating material, applyingwindings, and turning the edges of the lining material down against thewindings concomitantly with the inserting of a retainer strip into theslots between the turned down ed s of the lining material and the edgesof t e slots.

' 12. In an apparatus for compacting a plurality of flexible members inan armature recess formed in part by an undercut shoulder, thecombination of a wedging member adapted to hear at its op osite sidesagainst the undercut shoulder and the flexible members; and means forfeeding the wedging member into the recess.

13. An apparatus of the class described comprising means for compactinga plurality of wires in an armature recess; and means movable therewithfor inserting the leading end of a retaining member into the recess overthe compacted wires.

14. An apparatus for securing a plurality of flexible members in abottle shaped armature recess and comprising means movablelongitudinally through the recess for ressing the wires away from theneck of t e recess; and means for feeding a retaining member into therecess progressively with the pressing of the wires.

15. In a tool the combination of a member adapted to be movedlongitudinally in a recess in an armature and to be guided by the wallsthereof; and a cutting tool guided by said member for cutting insulatingmaterial adjacent the opening into the armature recess.

16. An apparatus for securing wires in an armature slot and comprisingmeans for inserting a retaining strip in an armature slot; and means forsupplying retaining strips to said first named means.

17. An apparatus comprising mechanism movable longitudinally in anarmature slot to compress wires therein to form a space for receiving aretaining member; means for inserting a retaining member in said space;and means for supplyin the retaining members to said last named means.

18. An apparatus comprising means for progressively cutting insulatingmaterial adjacent the month of an armature slot; and means forprogressively pressing the severed end portions of the said materialonto a plurality of wiresin the slot.

19. In a device for assembling armatures having an open slotted corelined with insulating material and supporting windings, the combinationwith a guide element to be inserted in the slots and adapted to compactthe windings in the slots; of means guided by said guide element forshearing the lining material adjacent the openings in said slots.

20. In a device for assembling armatures having an open slot-ted corelined with insulating material and supporting windin the combinationwith a guide element toil inserted in the slots and adapted to compactthe windings in the slots; of means guided by said guide element forinserting .a retainer stri in the slots between the windings and t eedges of said slots.

21. In a device for assembling armatures i 22. In acde'vice forassembling armatures having anopen slotted core lined with insul'atingmaterial and supporting windings,

of means guided by ide element for cutting the lining also guided by theing aretainer strip etween the turned down edges of the sheared liningmaterial and the edges of the slots.

28. In adevice for assembling armatures having 'a' n 'open slotted'corelined with insulating material and supporting windings,

. the combination with a guide element to be inserted in the slots anthewindings against the bottom ortions of adapted to press the slots; ofmeans guided by sai uide element for cuttin the lining material at theedges of said s ots; and means guided by said guide element for turningdown the sheared edges of the lining material against the windings inthe slots.

y 24:. In a device'for assembling armatures having an open slotted corelined with insulating material and supporting windings, the combinationwith a guide element to be inserted in the slots and adapted to forcethe windings against a slot wall, of means guided by said guide elementfor shearin the lining material at the edges of said slots; and meansguided by said guide element for inserting a retainer stri. in the slotsbetween the winding and t e edges of said slots.

25. In a device for assembling armatures having an open slotted 'corelined with insulating material and supporting windings, the combinationwith a guide element to be inserted in the slots and adapted tocompactthe windings; of means uided by said guide element for shearinmeans guided by said guide element for turning down the sheared edges ofthe lining material against the windings in the slots; and means guidedby said guide element for inserting a retainer strip in'the slotsbetween the windings and the edges of said slots.

26. In a device for assembling armatures having an open s otted corelined with insulating material and supporting windin the combinationwith a guide element to ll inserted in the slots; of means for shearingthe lining material atthe edges of said slots; means guided by the guideelement for turning the sheared edges of the lining said guide elementfor turning guided t e lining .material adjacent the edges 0 said slots;

material down against the windings'in the slots; and means also guidedby the guidmg. element for inserting a. retainer strip in the slotsbetween the turned down edges of the lining material and the edges ofthe s ots'.

27. In a device for assembling armatures having an open slotted corelined with insulating material and supporting windings, the combinationwith a guide element to be inserted in the slots; of-means ided by dawnthe sheared edges of thelining material against the windingsin'theslots;and means also by the guide element for inserting a retainerstripbetween the tumedidown edges of the shearedli g material and theedges of the slots.

28; In a devicei ]for assembling armatures' having cores provided withbottle shaped slots-comprising a large winding retaining portion and arestricted. neck portion, said core being wrapped with and said slotsbeing lined with a strip of insulation material, the combinationwith apilot having flange and web portions adapted to enter retaining neckportions of the slots res ectively; of a knife carried by the pilot andadapted to shear the lining material in the slots and so arranged as tobe inserted beneath the lining material around the core previous to theinsertion of the pilot member into the slots.

29. In a device for assembling armatures having bottle shaped slots witha. large winding retaining portion and a restricted neck portion linedwith insulating material extending outside the slots; the combinationwith a pilot having flange and web portions, the flange being adapted toenter the large winding retaining portion of the slot to force thewindings down into the slot, the web portion being adapted to enter therestricted neck portion of the slot to act as a guide and to force thelining material therein against the sides of the said re-' stricted neckportion; of a knife carried by the pilot and adapted to cam the liningmaterial toward the web portion of the pilot and cut it off. i

30. In a device for assembling armatures having cores proided withbottle shaped slots comprising a large winding retaining portion and arestricted neck portion, said core being'wra'pped with and said slotsbeing lined with a strip of insulating material; the combination with apilot having flange and web portions adapted to enter the retaining andneck portions of the slots respectively, of a knife having an angularcutting port on. and a body portion and adapted to be inserted in a slotin the web tremity of said slot, while the body portion is rigidly heldin position by means of a screw provided in the pilot, thereby tendingto hold said knife in a correctl alined' position relative to the'pilot,for facilitating the shearing of the lining material.

31. In a device for assembling armatures havingcores provided withbottle shaped slots comprisinga large windingretainin portion and arestricted neck portion, sai

holding said windings in the slots.

32. In a device for assembling armatures having cores provided withbottle shaped slots comprising a large winding retaining portion and arestricted neck ortion, said core being wrapped with and sa1d slotsbeinglined with a strip of insulating material; of a pilot having flange andweb portions adapted to enter the retaining and neck portions of theslots respectively; and a retainer stri receptacle formed in the pilotin direct a inement with the flange portion thereof, said receptaclebeing 'ada ted to contain a retainer strip slightly wi er than thesaidflange portion, and capable of being inserted in the armature slotsdirectly in the path-of the said flange portion of the pilot to hold thewindings in position in the slots. v

33. In a device for assembling armatures having cores provided withbottle shaped slots lined with insulating material and containingwindings; the combination with a pilot member including means forforcing the windings down into the slots, cutting means for shearing thelining material in the slots; means for folding said sheared paper downagainst the windings, and means or inserting a retainer strip in saidslots; ,of a magazine formed in a continuation of the pilot member andadapted to contain a plurality of retainer strips; and means forshifting one of these retainer strips from the magazine and insertingsaid strip in the arma- .ture slots; indetermmed sequence of operation.

7 34. In a device for assembling armatures having cores provided withbottle shaped slots lined with insulating material and containingwindings: the combination with a pilot member including means forforcing the wind ngs down into the slots, cutting means for shearin thelining material in' the slots; means or folding said sheared aper downagainst the windings, or inserting a retainer strip insaid slots;

adapted to hol or picking and means of a magazine formed in acontinuation of plurality of retainer strips; a stationary ousing inwhich the pilot member is ada ted to move longitudinally; a resilient eement connectin the housin and pilot and positionand means associatedwith the pilot up one of the retainer strips in the magazine and causingit to be laced in position in the rece tacle forme in the pilot forinserting t e strip in the armatureslots.

35. In a device for assembling armatures having cores lprovided withbottle shaped slots lined wit insulating material and containingwindings; the combination with a pilot including shearing, paper turningand retainerstri inserting devices; a magazine capable of ing insertedand held in a pocket formed in an extension of the pilot, said magazinebeing adapted to carry a supply o'f retainer strips; a housing in whichthe pilot is adapted to move lon itudinally, said housing beanprovidedwit a hollow handle (portion, w 11s the op site end is providewith buffer edges a apted to engage with the edge of the commutator corewhen a retainer strip is being inserted; a receptable formed in thehousin and into which a retainer strip is adapted to be inserted whenthe magazine and housin are in relatively abnormal position; a lateelement positioned in the pilot and adapted to slide over the retainerstrip until the pilot and housing elements are in relativ'el normalposition'when said latch drops bind the retainer strip to hold it inposition in a receptacle formed in the pilot member; and a resilientelement connected between the pilot and housing elements to bring thesetwo elements into normal relative position when one slot of the armatureis com letely assembled, and thereby adjust the device for the nextassembly operation.

36. In a device for assembling armatures having open slotted corescontaining windings, the combination with to insert a reta'i r stri amagazine retain stri a pilot adapted in the slots; of container assoeachin re atively normal ciated with said pilot an held in position thereinby means of spring controlled latches, and adapted to automaticallysupply a retainer strip for each cycle of operation of the ilot.

37. In a evice for assembling armatures havin open slotted corescontaining windings, t e combination with a pilot adapted to insert aretainer strip in the slots; of a magazine retainer container associated'with the pilot, said magazine having resilient means for causing aretainer strip to be brought into position capable of being inserted inthe armatuflakslot at each forward movementof the pilot.

38. In a device for assembling armatures having open slotted corescontaming windings, the combination with, a pilot adapted to insert a.retainer strip in the slots; of a magazine retainer strip containerassociated m the pilot and adapted to contain a plurality of retainerstrips to be inserted in the armature slots; of a plate in said magazineadapted'to force the retainer strips in a downwardly direction throughthe influence of resilient elements when said magazine is in position inthe pilot, and adjustable means for holdin said plate in positionagainst the to o the magazine for overcoming the e ect of the resilientelements associated therewith, to facilitate the loadin of the magazinewith retainer strips.

11 testimony whereof we hereto aifix our signatures.

GEORGE H. LELAND. ROBT. H. AHLERS.

